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Post by snark3 on Aug 21, 2018 14:10:43 GMT -8
I pulled this reg apart today. The seat (where the plunger contacts) has a small nick in it on one side, the other side has quite a few nicks. I needed a pretty potent magnifying glass to see them. Is there a way to clean this up? Maybe the old plunger (which has a piece missing from it) with a mild abrasive like toothpaste? Any thoughts or tips would be appreciated.
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Post by vance on Aug 21, 2018 15:40:14 GMT -8
Are you talking about the removable HP seat? Just replace it. Several of us have NOS or good ones. Got nylon plungers, too.
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Post by snark3 on Aug 22, 2018 11:09:03 GMT -8
Phil,
email sent
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Post by snark3 on Sept 4, 2018 11:53:37 GMT -8
I put this reg together today with the new seat, and...….. wala it does the exact same thing. IP runs up to about 200 psi, pops the second stage around 180, and free flows. When I shut the air off it leaks to about 160 and stays there. Anybody got any thoughts on what could be wrong here?
Thanks
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Post by nikeajax on Sept 4, 2018 13:14:58 GMT -8
Yes: please check the condition of the HP-diaphragm. Is it too thin? John was having this same problem with his first generation Healthways Scubair: he discovered that it was worn, and too thin on the HP-side.
I seem to recall that you were playing around with a different diaphragm for this: there may be something weird with the height of the part that touches the actuator...
JB
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Post by snark3 on Sept 4, 2018 18:38:53 GMT -8
Thanks JB, I'll check the diaphragm. I ended up reusing the old one because the holder that came with the new diaphragm was different. I should also mention that I had a senior moment while I was working on it. I put it together without that tiny pin that goes from the plunger to the diaphragm. I'm thinking now that as you said the diaphragm is too thin causing the pin to hold the plunger off the seat or there is something going on with the pin or plunger. maybe for giggles I'll try the old plunger, or at least see if the new one is the same as the old one.
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Post by nikeajax on Sept 5, 2018 7:11:41 GMT -8
SNORT!  So you didn't put the actuator pin/push rod in? I can see how hat would be problematic  JB |
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Post by snark3 on Sept 5, 2018 12:28:12 GMT -8
Yup I forgot to put the pin in and it locked up tight. That leads me to believe that the seat/plunger system is sealing. When I put the pin in I had problems. Because of that I'm thinking something is causing the pin to prevent the plunger from sealing on the seat. JB you mentioned possibly the diaphragm which contacts the other end of the pin, I'm also going to compare the old plunger to the new one. There is a pin which is part of the plunger, I'm going to check how much of this pin sticks out of the new plunger vs the old one. I might even try resurfacing the old one as you said JB and see what happens.
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Post by nikeajax on Sept 5, 2018 14:54:30 GMT -8
Snarky, if this stops being enjoyable for you, just send it to me: I'll make it work: just pay for the shipping! I have a Navy Unit first stage that I can pull parts from  JB |
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Post by SeaRat on Sept 5, 2018 15:36:19 GMT -8
A good way to check the pin is to put the pin/diaphragm in place, but without the locking nut and manually push it to see is the plunger is pushed back. You should be able to feel it move.
John
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Post by nikeajax on Sept 5, 2018 16:04:36 GMT -8
Just to be sure: do you have the adjuster backed all the way out?
JB
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Post by snark3 on Sept 6, 2018 2:26:33 GMT -8
JB that's very kind of you to offer, thank you. This is still fun for me. I'm enjoying learning about how regulators work. I hope I'm not driving you guys crazy with all my questions. When I work on my 69 Roadrunner I have a pretty good idea of how the Chrysler guys did things, and what's wrong. I will make sure the adjuster is all the way out.
John I will try that and see what happens.
Thanks guys
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Post by nikeajax on Sept 6, 2018 7:04:52 GMT -8
Ohhhh, cooool, a Roadrunner! I love anything that's not Ford or Chevy, I have a real soft spot for anything AMC or Studebaker though...
JB
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Post by snark3 on Sept 6, 2018 13:34:36 GMT -8
JB I love the old Chrysler products. Most car guys that like Chryslers go for the Roadrunners, Cudas, Chargers, and Challengers. I like all of those, but love the Furys and 300s too. Many years ago my brother had a Javelin, that was a cool car.
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Post by SeaRat on Sept 6, 2018 16:28:20 GMT -8
I dove my Hydro-Twin yesterday at High Rocks, and got some photos too. The dive was about 30 minutes long, using my twin 45s and the Hydro-Twin. The only problem is that I have shorter Voit grey hoses on it, and this setup puts my regulator pretty low on my back. So the mouthpiece is up around my neck. Bet the Hydro-Twin is really nice as a regulator, and I have a LP hose (not used, as my Pare-Sea BC had only an oral hose attachment), gauge (which is an old USD one, which leaked water and I need to do something about the O-ring), and my AIR I safe second.
John
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So you didn't put the actuator pin/push rod in? I can see how hat would be problematic 
